G1085 GMT | Alldatasheet

Document overview

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Technical content

Features

„ Available in Adjust Version „ Space Saving TO-252 Package and TO-263 Package „ Internal Short Circuit Current Limiting „ Internal Over Temperature Protection „ Output Current 3A

Applications

„ Post Regulation for Switching DC/DC Con- verter „ High Efficiency Linear Regulator „ Battery Charger „ Battery Powered Instrumentation „ Motherboard General Description The G1085 is a low dropout linear regulator with a dropout of 1.2V at 3A of load current. It is avail- able in an adjustable version, which can set the output from 1.25V to 5V with only two external resistors. The G1085 provides over temperature and over current protection circuits to prevent it from being damaged by abnormal operating conditions. The G1085 is available in TO-252 pack age and TO- 263 packages. A minimum of 100µF tantalum electrolytic capacitor is required at the output to improve the transient response and stability.

Ordering Information

(Pb free) MARKING TEMP. RANGE PACKAGE 1 2 3 G1085T43U G1085T4 3Uf G1085 -40°C to +85°C TO-252 GND/ADJ V OUT V IN G1085T53U G1085T5 3Uf G1085 -40°C to +85°C TO-263 GND/ADJ V OUT V IN * For other package types and pin options, please contact us at sales @gmt.com.tw Order Number Identification GXXXX XX X X Packing Type P i n O p t i o n Package Type P a r t N u m b e r PACKAGE TYPE PIN OPTION PACKING T4: TO-252 1 2 3 U & D: Tape & Reel Direction T5: TO-263 3: GND/ADJ V OUT V IN T: Tube Package Type Typical Application [Note 4]: Type of COUT VIN G1085 100µF VOUT IO COUT 100µF GND/ADJ VIN VOUT Top View 1 2 3 TO-252、TO-263 VIN G1085 100µF VOUT IO COUT 100µF GND/ADJ VIN VOUTVIN G1085 100µF VOUT IO COUT 100µF GND/ADJ VIN VOUT Top View 1 2 3 TO-252、TO-263 Top View 1 2 3 TO-252、TO-263

Ver: 1.2 Sep 20, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw G1085Global Mixed-mode Technology Inc. Absolute Maximum Ratings (Note 1) Power Dissipation Internally Limited (Note 2) Maximum Junction Temperature…...……………….150°C Storage Temperature Range…..…-65°C ≤ T J ≤+150°C Reflow Temperature (soldering, 10sec)…………260°C Thermal Resistance Junction to Ambient TO-252 Thermal Resistance Junction to Case Note (1): See Recommended Minimum Footprint Operating Conditions (Note 1)

Electrical Characteristics

Operating Conditions: VIN ≤ 7V, TA =TJ = 25°C unless otherwise specified. [Note3] PARAMETER CONDITION MIN TYP MAX UNIT Reference Voltage V IN - VOUT = 2V, IOUT = 10mA 1.225 1.250 1.275 V Line Regulation (V OUT + 1.5V) < VIN < 7V, IOUT = 10mA --- 0.5 1 % Load Regulation (V IN - VOUT) = 2V, 10mA < IOUT <3A --- 0.04 0.5 % Dropout Voltage ∆VOUT = 2%, IOUT = 3A --- 1.3 1.4 V Current Limit (V IN - VOUT) = 2V --- 5.4 --- A Adjust Pin Current Change V IN - VOUT = 2V, 10mA < IOUT < 3A --- 0.15 --- µA Minimum Load Current 1.5V < (VIN - VOUT) < 5.25V 10 --- --- mA Quiescent Current V IN - VOUT = 2V --- 80 150 µA Ripple Rejection f = 120Hz, COUT = 10µF Tantalum, (VIN - VOUT) = 3V, IOUT = 1A --- 48 --- dB Temperature Stability V IN = 4V, IO =10mA --- 0.3 --- % RMS Output Noise (% of VOUT) T A = 25°C, 10Hz < f < 10kHz, ILOAD = 10mA --- 0.007 --- % Thermal Shutdown Junction Temperature --- 150 --- °C Thermal Shutdown Hysteresis --- 30 --- °C Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Con- ditions are conditions under which the device functions but the specifications might not be guaranteed. For guaranteed specifications and test conditions see the Electrical Characteristics. Note 2: The maximum power dissipation is a function of the maximum junction temperature, TJmax ; total thermal re- sistance, θJA, and ambient temperature TA. The maximum allowable power dissipation at any ambient tem- perature is Tjmax-TA / θJA. If this dissipation is exceeded, the die temperature will rise above 150°C and IC will go into thermal shutdown. Note3: Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible. Note4: The type of output capacitor should be tantalum or aluminum.

Ver: 1.2 Sep 20, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw G1085Global Mixed-mode Technology Inc. Definitions Output Voltage The G1085 provides an adjustable output voltage from 1.25V to 5V. with two external resistors. It can be for- mulated as: R 2 VOUT = 1.25V x (1+ R1 ) + IADJ x R2 IADJ = 80µA (TYP) Dropout Voltage The input/output Voltage differential at which the regulator output no longer maintains regulation against further reductions in input voltage. Measured when the output drops 2% below its nominal value. Dropout voltage is affected by junction temperature, load cur- rent and minimum input supply requirements. Line Regulation The change in output voltage for a change in input voltage. The measurement is made under conditions of low dissipation or by using pulse techniques such that average chip temperature is not significantly af- fected. Load Regulation The change in output voltage for a change in load current at constant chip temperature. The measure- ment is made under conditions of low dissipation or by using pulse techniques such that average chip tem- perature is not significantly affected. Maximum Power Dissipation The maximum total device dissipation for which the regulator will operate within specifications. Quiescent Bias Current Current which is used to operate the regulator chip and is not delivered to the load.

Ver: 1.2 Sep 20, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw G1085Global Mixed-mode Technology Inc. Typical Performance Characteristics (VIN-VOUT=3V, VOUT=1.25V, CIN=100µF, COUT =100µF, TA=25°C, unless otherwise noted.) 10 100 1000 10000 100000 1000000 Frequency(Hz) Ripple Rejection (dB) IL=100mA 1.225 1.235 1.245 1.255 1.265 1.275 VIN (V) VOUT (V) Line Transient Response Load Transient Response Output NoiseShort Circuit-Current Ripple Rejection Line Regulation IL=10mA T=25°C T=25°C T=75°C 100mA (VIN-VOUT)>Vdropout Vripple<0.5 VP-P COUT=220µF

Ver: 1.2 Sep 20, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw G1085Global Mixed-mode Technology Inc. Typical Performance Characteristics (continued) Dropout Voltage vs. IOUT Load Regulation Output Voltage vs. Temperature IL = 2.5A Adj Pin Current vs. Temperature 0.5 1.5 01234 IOUT (A) Dropout Voltage (V) T = 25°C 1.240 1.243 1.245 1.248 1.250 1.253 1.255 - 5 0 - 3 0 - 1 0 1 03 05 07 0 Temperature (°C) VOUT (V) VIN = 5V VIN = 3V 100 -50 -30 -10 10 30 50 70 Temperature (°C) Adj Pin Current (µA) VIN = 5V VIN = 3V -50 -30 -10 10 30 50 70 Temperature (°C) Output Voltage Deviation (mV) IL = 10mA~2.5A VIN = 3V VIN = 5V IL = 2.5A 0.5 1.5 2.5 3.5 012345 PCB Top Copper Area (in2) Max. Dissipation Power (W) G1085T43(TO-252) Max. Power Dissipation vs. PCB Top Copper Area TAMB = 25°C ; Still Air 0.5 1.5 2.5 3.5 25 35 45 55 65 75 85 TAMB (°C) Max. Dissipation Power (W) A=0.1 A=0.2 A=0.3 A=0.4 A=0.5 A=1.0 A=1.5 A=2.0 A=2.5 A=3.0 A=3.5 A=4.0 A=4.5 A=5.0 G1085T43(TO-252) Max. Power Dissipation vs. TAMB (still air) ( Different PCB Top Copper Area ) Unit : in2

Ver: 1.2 Sep 20, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw G1085Global Mixed-mode Technology Inc. Typical Performance Characteristics (continued) Recommend Minimum Footprint 0.5 1.5 2.5 3.5 4.5 PCB Top Copper Area (in2) Max. Dissipation Power (W) G1085T53(TO-263) Max. Power Dissipation vs. PCB Top Copper Area TAMB = 25°C ; Still Air 0.5 1.5 2.5 3.5 4.5 25 35 45 55 65 75 85 TAMB (°C) Max. Dissipation Power (W) A=0.5 A=1.0 A=1.5 A=2.0 A=2.5 A=3.0 A=3.5 A=4.0 A=4.5 A=5.0 G1085T53(TO-263) Max. Power Dissipation vs. TAMB (still air) ( Different PCB Top Copper Area ) Unit : in2

Ver: 1.2 Sep 20, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw G1085Global Mixed-mode Technology Inc.

Package Information

TO-252 (T4) Package DIMENSION IN MILLIMETER DIMENSION IN INCH SYMBOL MIN. MAX. MIN. MAX. A 2.19 2.38 0.086 0.094 A1 0.89 1.27 0.035 0.050 b 0.64 0.89 0.025 0.035 C 0.46 0.58 0.018 0.023 D 5.97 6.22 0.235 0.245 E 6.35 6.73 0.250 0.265 E1 5.21 5.46 0.205 0.215 e 2.26 BSC 0.09 BSC e1 3.96 5.18 0.156 0.204 F 0.46 0.58 0.018 0.023 L1 0.89 2.03 0.035 0.080 L2 0.64 1.02 0.025 0.040 L3 2.40 2.80 0.095 0.110 H 9.40 10.40 0.370 0.410 θ 0° 4° 0° 4° F A E D b e Ce1 H θ F A E D b e Ce1 H θ

Ver: 1.2 Sep 20, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw G1085Global Mixed-mode Technology Inc. TO-263 (T5) Package MILLIMETER INCH SYMBOL MIN MAX MIN MAX A 4.30 4.70 0.169 0.185 A1 1.22 1.32 0.048 0.055 A2 2.45 2.69 0.104 0.106 b 0.69 0.94 0.027 0.037 b1 1.22 1.40 0.048 0.055 C 0.36 0.56 0.014 0.022 D 8.64 9.652 0.340 0.380 E 9.70 10.54 0.382 0.415 e 2.29 2.79 0.090 0.110 e1 4.83 5.33 0.190 0.210 H 14.60 15.78 0.575 0.625 L 4.70 5.84 0.185 0.230 L1 1.20 1.778 0.047 0.070 L2 2.24 2.84 0.088 0.111 L3 1.40MAX 0.055MAX Package Orientation PACKAGE Q’TY/REEL TO-252 2,500 ea TO-263 1,000 ea GMT Inc. does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and GMT Inc. reserves the right at any time without notice to change said circuitry and specifications. e D H b E A C L e D H b E A C L Feed Direction Feed Direction Feed Direction Feed Direction